NEET Biology question
The sperm and the egg make different contributions to the zygote. Which of the following statements about their contributions are true? (i) Sperm contributes most of the mitochondria. (ii) Egg contributes most of the cytoplasm. (iii) Both sperm and egg contribute a haploid nucleus. (iv) Both sperm and egg contribute centrioles.
Answer: (C)
Solution
The egg, being much larger than the sperm, contributes virtually all of the zygote's cytoplasm (ii, true), and both gametes contribute a haploid pronucleus that fuse to restore the diploid number (iii, true). By contrast, it is the egg's mitochondria that survive in the
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